Thread: Two quick questions

  1. #1
    Registered User
    Join Date
    Mar 2008

    Two quick questions

    Please I'm a beginner and I would like an answer to two questions

    1.) what is the meaning of -> in C++

    2.) Also, what is a custom mask as it applies to image processing?

  2. #2
    Technical Lead QuantumPete's Avatar
    Join Date
    Aug 2007
    London, UK
    Ok, I can answer 1) -> is used to dereference a pointer and then access a member.
    So say you have
    someObj * myptr = new someObj;
    it is the same as doing (*myptr).someMemberFunction()

    "No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
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  3. #3
    Kernel hacker
    Join Date
    Jul 2007
    Farncombe, Surrey, England
    I have absolutely no idea of "custom mask as it applies to images" - that requires further context to clarify that - it could mean MANY different things [if this is a homework question, it's probably a explained in some sense in the literature you have for the course, and that gives it the right context].

    a->b is a shorter/simpler version of (*a).b

    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

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